Protocols problems in Swift - ios

Question

I'm implementing the RayWenderlich Slide out Navigation Panel: http://www.raywenderlich.com/78568/create-slide-out-navigation-panel-swift
And I want to open a new view ont Imageview tap like if I was clicking on the menu:
Link 2: NosOffres
Link 1: (index) Accueil (here is the Imageview)
Problem:
If I go in Link 2 from the Navigation/Menu, I can re-open the Navigation/Menu by slide or icon menu tap
If I go in Link 2 from the Image View, I can re-open the Navigation/Menu by slide but not with by icon menu tap
I tried many solutions and asked here for help but no way to have a response, now I tried an another thing, but I have a protocol problem:
I can't redeclare a protocol (in CenterViewController.swift), so I don't know how to do:
CenterViewController.swift:
#objc protocol CenterViewControllerDelegate {
optional func toggleLeftPanel()
optional func collapseSidePanels()
}
protocol CenterViewControllerDelegate {
func itemSelected(item: AccueilItem)
}
class CenterViewController: UIViewController {
var delegate: CenterViewControllerDelegate?
var menus: Array<Menu>!
override func viewDidLoad() {
super.viewDidLoad()
self.navigationController?.navigationBar.barTintColor = UIColor(red: 38.0/255.0, green: 51.0/255.0, blue: 85.0/255.0, alpha: 1.0)
self.navigationController?.navigationBar.titleTextAttributes = [NSFontAttributeName: UIFont(name: "Gotham", size: 13)!, NSForegroundColorAttributeName : UIColor.whiteColor()]
self.title = "ACCUEIL"
// Do any additional setup after loading the view, typically from a nib.
}
#IBAction func menuTapped(sender: AnyObject) {
delegate?.toggleLeftPanel?()
}
#IBAction func nosOffresTapped(sender: AnyObject) {
print("lol")
delegate?.itemSelected(AccueilItem(rawValue: "NosOffres")!)
}
}
enum AccueilItem: String {
case Accueil
case NosOffres
case DemandeGratuite
case ContactezNous
case Actualites
case MentionsLegales
func viewController() -> UIViewController {
switch (self) {
case Accueil: return UIStoryboard.centerViewController()!
case NosOffres: return UIStoryboard.nosOffresViewController()!
case DemandeGratuite: return {
let vc = UIViewController();
vc.view.backgroundColor = UIColor.orangeColor();
return vc
}()
case ContactezNous: return UIStoryboard.nosOffresViewController()!
case Actualites: return UIStoryboard.nosOffresViewController()!
case MentionsLegales: return UIStoryboard.nosOffresViewController()!
}
}
}
private extension UIStoryboard {
class func mainStoryboard() -> UIStoryboard { return UIStoryboard(name: "Main", bundle: NSBundle.mainBundle()) }
class func leftViewController() -> SidePanelViewController? {
return mainStoryboard().instantiateViewControllerWithIdentifier("LeftViewController") as? SidePanelViewController
}
class func centerViewController() -> CenterViewController? {
return mainStoryboard().instantiateViewControllerWithIdentifier("CenterViewController") as? CenterViewController
}
class func nosOffresViewController() -> NosOffresViewController? {
return mainStoryboard().instantiateViewControllerWithIdentifier("NosOffresViewController") as? NosOffresViewController
}
}
NosOffresViewController.swift:
#objc
protocol NosOffresViewControllerDelegate {
optional func toggleLeftPanel()
optional func collapseSidePanels()
}
class NosOffresViewController: UIViewController {
var delegate: NosOffresViewControllerDelegate?
override func viewDidLoad() {
super.viewDidLoad()
self.navigationController?.navigationBar.barTintColor = UIColor(red: 38.0/255.0, green: 51.0/255.0, blue: 85.0/255.0, alpha: 1.0)
self.navigationController?.navigationBar.titleTextAttributes = [NSFontAttributeName: UIFont(name: "Gotham", size: 13)!, NSForegroundColorAttributeName : UIColor.whiteColor()]
self.title = "NOS OFFRES"
// Do any additional setup after loading the view, typically from a nib.
}
}
ContainerViewController.swift:
enum SlideOutState{
case BothCollapsed
case LeftPanelExpanded
}
class ContainerViewController: UIViewController, CenterViewControllerDelegate, SidePanelViewControllerDelegate, UIGestureRecognizerDelegate {
var centerNavigationController: UINavigationController!
var centerViewController: CenterViewController!
var currentState: SlideOutState = .BothCollapsed
var leftViewController: SidePanelViewController?
let centerPanelExpandedOffset: CGFloat = 60
override func viewDidLoad() {
super.viewDidLoad()
centerViewController = UIStoryboard.centerViewController()
centerViewController.delegate = self
centerNavigationController = UINavigationController(rootViewController: centerViewController)
view.addSubview(centerNavigationController.view)
addChildViewController(centerNavigationController)
centerNavigationController.didMoveToParentViewController(self)
let panGestureRecognizer = UIPanGestureRecognizer(target: self, action: "handlePanGesture:")
centerNavigationController.view.addGestureRecognizer(panGestureRecognizer)
}
}
// MARK: CenterViewController delegate
extension ContainerViewController {
func itemSelected(item: MenuItem) {
let vc = item.viewController()
//create a new button
let button: UIButton = UIButton(type: UIButtonType.Custom)
//set image for button
button.setImage(UIImage(named:"IconeMenu"), forState: UIControlState.Normal)
//add function for button
button.addTarget(self, action: "toggleLeftPanel", forControlEvents: UIControlEvents.TouchUpInside)
//set frame
button.frame = CGRectMake(0, 0,30, 30)
let barButton = UIBarButtonItem(customView: button)
//assign button to navigationbar
vc.navigationItem.leftBarButtonItem = barButton
self.centerNavigationController.viewControllers = [vc]
self.collapseSidePannels()
}
func nosOffresSelected(item: AccueilItem) {
let vc = item.viewController()
//create a new button
let button: UIButton = UIButton(type: UIButtonType.Custom)
//set image for button
button.setImage(UIImage(named:"IconeMenu"), forState: UIControlState.Normal)
//add function for button
button.addTarget(self, action: "toggleLeftPanel", forControlEvents: UIControlEvents.TouchUpInside)
//set frame
button.frame = CGRectMake(0, 0,30, 30)
let barButton = UIBarButtonItem(customView: button)
//assign button to navigationbar
vc.navigationItem.leftBarButtonItem = barButton
self.centerNavigationController.viewControllers = [vc]
self.collapseSidePannels()
}
}
extension ContainerViewController {
func toggleLeftPanel() {
let notAlreadyExpanded = (currentState != .LeftPanelExpanded)
if notAlreadyExpanded {
addLeftPanelViewController()
}
animateLeftPanel(shouldExpand: notAlreadyExpanded)
}
func collapseSidePannels() {
switch (currentState) {
case .LeftPanelExpanded:
toggleLeftPanel()
default:
break
}
}
func addLeftPanelViewController() {
if (leftViewController == nil) {
leftViewController = UIStoryboard.leftViewController()
leftViewController!.menus = Menu.allMenu()
addChildSidePanelController(leftViewController!)
}
}
func addChildSidePanelController(sidePanelController: SidePanelViewController) {
sidePanelController.delegate = self
view.insertSubview(sidePanelController.view, atIndex: 0)
addChildViewController(sidePanelController)
sidePanelController.didMoveToParentViewController(self)
}
func animateLeftPanel(shouldExpand shouldExpand: Bool) {
if (shouldExpand) {
currentState = .LeftPanelExpanded
animateCenterPanelXPosition(targetPosition: CGRectGetWidth(centerNavigationController.view.frame) - centerPanelExpandedOffset)
} else {
animateCenterPanelXPosition(targetPosition: 0) { finished in
self.currentState = .BothCollapsed
self.leftViewController!.view.removeFromSuperview()
self.leftViewController = nil;
}
}
}
func animateCenterPanelXPosition(targetPosition targetPosition: CGFloat, completion: ((Bool) -> Void)! = nil) {
UIView.animateWithDuration(0.5, delay: 0, usingSpringWithDamping: 0.8, initialSpringVelocity: 0, options: .CurveEaseInOut, animations: {
self.centerNavigationController.view.frame.origin.x = targetPosition
}, completion: completion)
}
}
extension ContainerViewController {
// MARK: Gesture recognizer
func handlePanGesture(recognizer: UIPanGestureRecognizer) {
let gestureIsDraggingFromLeftToRight = (recognizer.velocityInView(view).x > 0)
switch(recognizer.state) {
case .Began:
if (currentState == .BothCollapsed) {
if (gestureIsDraggingFromLeftToRight) {
addLeftPanelViewController()
}
}
case .Changed:
if (((recognizer.view!.center.x + recognizer.translationInView(view).x) > view.center.x || gestureIsDraggingFromLeftToRight) && (recognizer.view!.center.x >= view.center.x && recognizer.velocityInView(view).x > 0 || recognizer.view!.center.x > view.center.x && recognizer.velocityInView(view).x < 0) && recognizer.view!.center.x + recognizer.translationInView(view).x > view.center.x) {
recognizer.view!.center.x = recognizer.view!.center.x + recognizer.translationInView(view).x
recognizer.setTranslation(CGPointZero, inView: view)
}
case .Ended:
if (leftViewController != nil) {
// animate the side panel open or closed based on whether the view has moved more or less than halfway
let hasMovedGreaterThanHalfway = recognizer.view!.center.x > view.bounds.size.width
animateLeftPanel(shouldExpand: hasMovedGreaterThanHalfway)
}
default:
break
}
}
}
private extension UIStoryboard {
class func mainStoryboard() -> UIStoryboard { return UIStoryboard(name: "Main", bundle: NSBundle.mainBundle()) }
class func leftViewController() -> SidePanelViewController? {
return mainStoryboard().instantiateViewControllerWithIdentifier("LeftViewController") as? SidePanelViewController
}
class func centerViewController() -> CenterViewController? {
return mainStoryboard().instantiateViewControllerWithIdentifier("CenterViewController") as? CenterViewController
}
class func nosOffresViewController() -> NosOffresViewController? {
return mainStoryboard().instantiateViewControllerWithIdentifier("NosOffresViewController") as? NosOffresViewController
}
}
SidePanelViewController.swift:
protocol SidePanelViewControllerDelegate {
func itemSelected(item: MenuItem)
}
class SidePanelViewController: UIViewController {
#IBOutlet weak var tableView: UITableView!
var delegate: SidePanelViewControllerDelegate?
var menus: Array<Menu>!
struct TableView {
struct CellIdentifiers {
static let MenuCell = "MenuCell"
}
}
override func viewDidLoad() {
super.viewDidLoad()
let tblView = UIView(frame: CGRectZero)
tableView.tableFooterView = tblView
tableView.tableFooterView!.hidden = true
tableView.backgroundColor = UIColor(red: 71.0/255.0, green: 88.0/255.0, blue: 130.0/255.0, alpha: 1.0)
tableView.reloadData()
}
}
extension SidePanelViewController: UITableViewDataSource {
func numberOfSectionsInTableView(tableView: UITableView) -> Int {
return 1
}
func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return 6
}
func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCellWithIdentifier(TableView.CellIdentifiers.MenuCell, forIndexPath: indexPath) as! MenuCell
cell.configureForMenu(menus[indexPath.row])
return cell
}
}
// Mark: Table View Delegate
extension SidePanelViewController: UITableViewDelegate {
func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {
_ = menus[indexPath.row]
delegate?.itemSelected(MenuItem(rawValue: indexPath.row)!)
}
}
enum MenuItem: Int {
case Accueil
case NosOffres
case DemandeGratuite
case ContactezNous
case Actualites
case MentionsLegales
func viewController() -> UIViewController {
switch (self) {
case Accueil: return UIStoryboard.centerViewController()!
case NosOffres: return UIStoryboard.nosOffresViewController()!
case DemandeGratuite: return {
let vc = UIViewController();
vc.view.backgroundColor = UIColor.orangeColor();
return vc
}()
case ContactezNous: return UIStoryboard.nosOffresViewController()!
case Actualites: return UIStoryboard.nosOffresViewController()!
case MentionsLegales: return UIStoryboard.nosOffresViewController()!
}
}
}
class MenuCell: UITableViewCell {
#IBOutlet weak var label: UILabel!
func configureForMenu(menu: Menu) {
label.text = menu.title
}
}
private extension UIStoryboard {
class func mainStoryboard() -> UIStoryboard { return UIStoryboard(name: "Main", bundle: NSBundle.mainBundle()) }
class func leftViewController() -> SidePanelViewController? {
return mainStoryboard().instantiateViewControllerWithIdentifier("LeftViewController") as? SidePanelViewController
}
class func centerViewController() -> CenterViewController? {
return mainStoryboard().instantiateViewControllerWithIdentifier("CenterViewController") as? CenterViewController
}
class func nosOffresViewController() -> NosOffresViewController? {
return mainStoryboard().instantiateViewControllerWithIdentifier("NosOffresViewController") as? NosOffresViewController
}
}
I really don't know how to do here I tried to do the same thing of SidePanelViewController to CenterViewController, but I don't know if they're an another solution, help me please.

Answer 1

Your problem resides in when you use the menu to show a new UIViewController you are manipulating the navigationItem in your ContainerViewController in this way:
func itemSelected(item: MenuItem) {
let vc = item.viewController()
//create a new button
let button: UIButton = UIButton(type: UIButtonType.Custom)
//set image for button
button.setImage(UIImage(named:"IconeMenu"), forState: UIControlState.Normal)
//add function for button
button.addTarget(self, action: "toggleLeftPanel", forControlEvents: UIControlEvents.TouchUpInside)
//set frame
button.frame = CGRectMake(0, 0,30, 30)
let barButton = UIBarButtonItem(customView: button)
//assign button to navigationbar
vc.navigationItem.leftBarButtonItem = barButton
self.centerNavigationController.viewControllers = [vc]
self.collapseSidePannels()
}
And for the above code the UINavigationController remains the same when you open the NosOffresViewController.
One way to solve your problem is add a new method in your CenterViewControllerDelegate and call it before push the new UIViewController and pass the reference to it:
#objc protocol CenterViewControllerDelegate {
optional func toggleLeftPanel()
optional func collapseSidePanels()
optional func pushViewControllerInStack(viewController: UIViewController)
}
Like the following way:
#IBAction func nosOffresTapped(sender: AnyObject) {
self.navigationController?.pushViewController(UIStoryboard.nosOffresViewController()!, animated: false)
self.delegate?.pushViewControllerInStack!(UIStoryboard.nosOffresViewController()!)
}
And then in your ContainerViewController implements the method like in the following way:
func pushViewControllerInStack(viewController: UIViewController) {
let vc = viewController
//create a new button
let button: UIButton = UIButton(type: UIButtonType.Custom)
//set image for button
button.setImage(UIImage(named:"IconeMenu"), forState: UIControlState.Normal)
//add function for button
button.addTarget(self, action: "toggleLeftPanel", forControlEvents: UIControlEvents.TouchUpInside)
//set frame
button.frame = CGRectMake(0, 0,30, 30)
let barButton = UIBarButtonItem(customView: button)
//assign button to navigationbar
vc.navigationItem.leftBarButtonItem = barButton
self.centerNavigationController.viewControllers = [vc]
self.collapseSidePannels()
}
And this should work to present any new UIViewController from the CenterViewController.
I hope this help you.